Most of the time, the progression stops when a person reaches adulthood. The other common kind occurs in middle life and beyond, and rarely progresses beyond grade 1 or 2 (mild). The process of slippage is not something people feel.

Most of the time, the progression stops when a person reaches adulthood. The other common kind occurs in middle life and beyond, and rarely progresses beyond grade 1 or 2 (mild). The process of slippage is not something people feel.
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